<template>
 
<el-container class="home-container">
  <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="../assets/1.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <button type="info" @click="logout">退出</button>
  </el-header>
  <!-- 主体区域 -->
  <el-container>
    <!-- 侧边栏区域 -->
    <el-aside :width="isCollapse ? '64px' : '200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>

      <el-menu
      background-color="#333744"
      text-color="#fff" 
      active-text-color="#ffd04b" 
      unique-opened 
      :collapse="isCollapse" 
      :collapse-transition="false"
      router 
      :default-active="activePath">
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
        <!-- 一级菜单模板 -->
        <template slot="title">
                    <!-- 图标 -->
                    <i :class="iconsObj[item.id]"></i>
                    <!-- 文本 -->
                    <span>{{item.authName}}</span>
        </template>

        <!-- 二级菜单 -->
     <el-menu-item :index="'/' + subItem.path + ''" 
     v-for="subItem in item.children" 
     :key="subItem.id"
     @click="saveNavState('/' + subItem.path)">
          <!-- 二级菜单模板 -->
         <template slot="title">
                    <!-- 图标 -->
                    <i class="el-icon-menu"></i>
                    <!-- 文本 -->
                    <span>{{subItem.authName}}</span>
        </template>
     </el-menu-item>
       
    
      </el-submenu>
 
    </el-menu>

    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
   
</template>

<script>

export default {
name: 'Home',
data(){
  return{
    menuList:[],
    iconsObj:{
      '125':'iconfont icon-user',
      '103':'iconfont icon-tijikongjian',
      '101':'iconfont icon-shangpin',
      '102':'iconfont icon-danju',
      '145':'iconfont icon-baobiao',
    },
    isCollapse:false,
    activePath:''
  }
},
created(){
  this.getMenuList()
  this.activePath = window.sessionStorage.getItem('activePath')
  // 为什么还要写这一步
  //未解决：点击其他链接，在点用户链接，不处于高亮状态
  // this.activePath = activePath

},

methods:{
  logout(){
    window.sessionStorage.clear()
    this.$router.push('/login')
  },
  async getMenuList(){
   const{data:res} = await this.$http.get('menus')
   console.log(res);
   if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
   this.menuList=res.data
  },
  toggleCollapse(){
      this.isCollapse = !this.isCollapse
  },
  saveNavState(activePath){
    window.sessionStorage.setItem('activePath',activePath)
    
  }
}

}
</script>

<style lang="less" scoped>
.home-container{
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left:0;
  align-items: center;
  color:#fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    img {
      height: 72px;
    }
    span{
      margin-left: 15px;
    }

  }


}

.el-aside {
  background-color: #333744;
   .el-menu{
     // 0 或者none都可
    border-right: 0;
    }
    .toggle-button{
      background-color: #4a5064;
      font-size: 10px;
      line-height: 24px;
      text-align: center;
      color: #fff;
      letter-spacing: 0.2em;
      cursor:pointer
  }
}

.el-main {
  background-color: #EAEDF1;
}
.iconfont {
  margin-right: 10px;
}


</style>